Method and apparatus for routing telecommunications signals

Inactive Publication Date: 2005-03-08
CISCO TECH INC
View PDF29 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

These and other features and objects of the invention w

Problems solved by technology

The ability to carry large amounts of telecom traffic on an optical fiber solves the long-distance point-to-point transport problem, but does not address the issue of how to add and remove traffic from the high-speed data stream.
However, optical signals of at least 2.4 Gb / s have become standard, and numerous problems arise with traditional ADMs due to the timing associated with the multiplexing and transmission of the high-speed-signals between the interface cards and the cross-connect unit.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and apparatus for routing telecommunications signals
  • Method and apparatus for routing telecommunications signals
  • Method and apparatus for routing telecommunications signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

In describing a preferred embodiment of the invention illustrated in the drawings, specific terminology will be used for the sake of clarity. However, the invention is not intended to be limited to the specific terms so selected, and it is to be understood that each specific term includes all technical equivalents which operate in a similar manner to accomplish a similar purpose.

With reference to the drawings, in general, and FIGS. 1 through 9 in particular, the apparatus and method of the present invention are disclosed.

The present invention supports numerous telecommunications (telecom) and networking standards, including the following which are incorporated herein by reference:Bellcore Standard GR-253 CORE, Synchronous Optical Network (SONET) Transport Systems: Common Generic Criteria, Issue 2, December 1995;Bellcore Standard GR-1230 CORE, SONET Bi-directional Line-Switched Ring Equipment Generic Criteria, Issue 3A, December 1996;Bellcore TR-NWT-000496, SONET Add-Drop Multiplex E...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention discloses a method and apparatus for cross-connecting high-speed telecommunications signals at a cross-connect apparatus. The cross-connect apparatus can transmit the telecommunications signals from an input interface card to a cross-connect card, and from the cross-connect card to an output interface card without any synchronization information. Synchronization of the signals is accomplished with circuitry contained on the interface cards and the cross-connect card. The cross-connect apparatus also includes a control unit for managing the control and timing of the apparatus.

Description

BACKGROUND OF THE INVENTIONTelecommunications (telecom) systems are carrying increasing amounts of information, both in long distance networks as well as in metropolitan and local area networks. At present, data traffic is growing much faster than voice traffic, and includes high bandwidth video signals. In addition to the requirement for equipment to carry increasing amounts of telecom traffic there is a need to bring this information from the long distance networks to businesses and to locations where it can be distributed to residences over access networks.The equipment which has been developed to carry large amounts of telecom traffic includes fiber optic transport equipment which can carry high speed telecom traffic. The data rates on fiber optic systems can range from millions of bits per second (Mb / s) to billions of bits per second (Gb / s). In addition, multiple wavelengths of light can be carried on an optical fiber using Wavelength Division Multiplexing (WDM) techniques.The ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L12/56
CPCH04L49/25H04L49/1523H04L49/40H04L49/357H04L49/30
InventorELLIOT, PAUL M.LE, PHU S.
OwnerCISCO TECH INC